A 3D structural analysis of the Goliat field, Barents Sea, Norway

Mulrooney, Mark Joseph; Leutscher, Johan; Braathen, Alvar

doi:10.1016/j.marpetgeo.2017.05.038

Cited by 22 publications

(27 citation statements)

References 220 publications

(306 reference statements)

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“…• The observations and interpretations reported in this study are relevant to studies in the Barents Sea region, as the Kvalpynten strata extend offshore , where similar successions have been documented at sub-seismic to seismic scale (e.g. Mulrooney, Leutscher, & Braathen, 2017;Serck, Faleide, Braathen, Kjølhamar, & Escalona, 2017). More broadly, this study provides insights into facies associations and facies architectures that can be expected in other growth-faulted deltaic successions systems around the world.…”

Section: Highlightssupporting

confidence: 54%

Sedimentary architecture during Carboniferous rift initiation – the arid Billefjorden Trough, Svalbard

Smyrak-Sikora

Johannessen²,

Olaussen³

et al. 2018

JGS

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When, in March 2011, I entered the building of the University Centre in Svalbard (UNIS) my first thought was:"I want to work here". This dream came true only a year later when I started my long but very rewarding journey through the PhD project. Firstly, I would like to thank my supervisor Snorre Olaussen for offered chance to develop this exciting project in Arctic rift basin geology, his patience and trust. Transition from research conducted in structural geology of metamorphic rocks to basin analysis was not easy and Snorre always served with the guidance, help and tutoring. Huge acknowledgments go to Alvar Braathen, who has introduced me to the outcrops of Billefjorden and Edgeøya, and always offered great support and advice. William Helland Hansen and Jan Inge Faleide are acknowledged for their supervision on the project. I strongly appreciate the scientific freedom and multiple possibilities for development and collaboration I had during the research.

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Section: Highlightssupporting

confidence: 54%

Sedimentary architecture during Carboniferous rift initiation – the arid Billefjorden Trough, Svalbard

Smyrak-Sikora

Johannessen²,

Olaussen³

et al. 2018

JGS

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“…The Barents Shelf, including Svalbard and the Southwestern Barents Sea region, is characterized by subtle tectonic activity throughout the Triassic (Glørstad-Clark, Faleide, Lundschien, & Nystuen, 2010;Klausen, 2013); however, some fault complexes experiencing mild reactivation (Anell, Braathen, Olaussen, & Osmundsen, 2013;Maher, Ogata, & Braathen, 2016;Mulrooney, Leutscher, & Braathen, 2017;Osmundsen, Braathen, Rød, & Hynne, 2014;Serck, Faleide, Braathen, Kjølhamar, & Escalona, 2017). More comprehensive tectonic events occurred especially in the southwest (Breivik, Faleide, & Gudlaugsson, 1998;Gabrielsen, 1984;Johansen et al, 1993;Mørk, Embry, & Weitschat, 1989).…”

Section: Regional Geologymentioning

confidence: 99%

Thermal history of a Triassic sedimentary sequence verified by a multi‐method approach: Edgeøya, Svalbard, Norway

et al. 2018

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Temperature impacts the quality of reservoir and source rocks, thereby representing an important aspect of petroleum prospect assessments of any basin. This case study of the Triassic basin of Edgeøya, eastern Svalbard, reevaluate earlier burial estimates that were solely based on organic matter maturation data from organic rich shales. Here, we estimate temperatures using a multi‐method approach: Rock‐Eval pyrolysis parameters, fluid inclusions in diagenetic quartz, and inorganic diagenesis signatures of sandstones. Data were collected from organic rich shales of the Botneheia and Tschermakfjellet formations and coal bearing sandstones of the De Geerdalen Formation. Rock‐Eval pyrolysis data indicate that Botneheia and Tschermakfjellet formations experienced burial temperatures of about 124–138°C while the De Geerdalen Formation experienced temperatures ≥92°C. Homogenization temperatures of the De Geerdalen Formation sandstones give similar diagenetic temperatures, from 70 to 124°C, while the kaolinite to dickite transformation implies the temperatures >90°C. Furthermore, the absence of illite formation associated with kaolinite suggest that temperature have never exceed 130°C. Integrating various methods validate spatial variations in temperature proxies and constrain the thermal history of this basin. Cretaceous intrusions have locally affected the temperatures and have obscured regional subsidence and uplift trends. The effect of igneous intrusions on inorganic matter is very limited, but intensive on organic matter. These differences between organic and inorganic thermal indices help in distinguishing of magmatic from burial heating. This study has therefore relevance in deciphering the thermal history of sandstones experiencing magmatic activity coupled with multiple burial and uplift events.

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“…The E‐W trends and the anomalies tied to the TFFC might be indications of minor local late Triassic tectonic activity along this master fault (Mulrooney et al. ). However, the fidelity of the flattening process is questionable in areas with dense faulting, which limits the resolution of the extracted anomalies, especially when dealing with very thin sands.…”

Section: Resultsmentioning

confidence: 99%

“…1) and it cuts across the Goliat Field. The TFFC has a series of listric normal faults (Faleide, Gudlaugsson and Jacquart 1984;Gabrielsen 1984;Gabrielsen et al 1990;Mulrooney, Leutscher and Braathen 2017) forming a prominent roll-over anticline that provides structural closure for the field. Later Cenozoic uplift and exhumation in the Goliat area resulted in approximately 1000 to 1500 m of net erosion (Ohm, Karlsen and Austin 2008;Henriksen et al 2011b;Baig et al 2016).…”

Section: G E O L O G I C a L S E T T I N Gmentioning

confidence: 99%

Integrating facies‐based Bayesian inversion and supervised machine learning for petro‐facies characterization in the Snadd Formation of the Goliat Field, south‐western Barents Sea

Yenwongfai

Mondol

Lecomte

et al. 2018

Geophysical Prospecting

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Seismic petro‐facies characterization in low net‐to‐gross reservoirs with poor reservoir properties such as the Snadd Formation in the Goliat field requires a multidisciplinary approach. This is especially important when the elastic properties of the desired petro‐facies significantly overlap. Pore fluid corrected endmember sand and shale depth trends have been used to generate stochastic forward models for different lithology and fluid combinations in order to assess the degree of separation of different petro‐facies. Subsequently, a spectral decomposition and blending of selected frequency volumes reveal some seismic fluvial geomorphological features. We then jointly inverted for impedance and facies within a Bayesian framework using facies‐dependent rock physics depth trends as input. The results from the inversion are then integrated into a supervised machine learning neural network for effective porosity discrimination. Probability density functions derived from stochastic forward modelling of endmember depth trends show a decreasing seismic fluid discrimination with depth. Spectral decomposition and blending of selected frequencies reveal a dominant NNE trend compared to the regional SE–NW pro‐gradational trend, and a local E–W trend potentially related to fault activity at branches of the Troms‐Finnmark Fault Complex. The facies‐based inversion captures the main reservoir facies within the limits of the seismic bandwidth. Meanwhile the effective porosity predictions from the multilayer feed forward neural network are consistent with the inverted facies model, and can be used to qualitatively highlight the cleanest regions within the inverted facies model. A combination of facies‐based inversion and neural network improves the seismic reservoir delineation of the Snadd Formation in the Goliat Field.

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A 3D structural analysis of the Goliat field, Barents Sea, Norway

Cited by 22 publications

References 220 publications

Sedimentary architecture during Carboniferous rift initiation – the arid Billefjorden Trough, Svalbard

Sedimentary architecture during Carboniferous rift initiation – the arid Billefjorden Trough, Svalbard

Thermal history of a Triassic sedimentary sequence verified by a multi‐method approach: Edgeøya, Svalbard, Norway

Integrating facies‐based Bayesian inversion and supervised machine learning for petro‐facies characterization in the Snadd Formation of the Goliat Field, south‐western Barents Sea

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